Endpoint class has incorrect Kind.

[jparklab]

Kind for Endpoint is 'Endpoints' instead of 'Endpoint'

https://kubernetes.io/docs/concepts/services-networking/service/
https://github.com/kelproject/pykube/blob/master/pykube/objects.py#L225

I can work-around by defining a new class as below, but can you please update the pykube?

class Endpoints(NamespacedAPIObject):

    version = "v1"
    endpoint = "endpoints"
    kind = "Endpoints"